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4 Sheets sheet 2 (No Model.)

J. E. RAGHIELLES. STONE DRILLING MACHINE,

Patented Jan. 1,1895.

(No Model.) 4 Sheets-Sheet 3.

' J. E. RAGHIELLES.

STONE DRILLING MAGHINE.

Patented Jan. 1, 1895 I (No Model.) 4 Sheets-Sheet 4.

J. E. .RAGHIBLLES.

STONE DRILLING MACHINE.

No. 531,967. Patented Jan. 1, 1895.

' UhlllilllD S'rnr s PATENT @rrrcn.

JAMES EVE-ET RACIIIELLES, OF CHEROKEE, ALABAMA, ASSlGNOR OF ONE- llALFTO GEORGE E. BURBANK, OF SAME PLACE.

STONE=DRILLI NG MACHINE.

T ail whom it may concern;

Be it known that 1, JAMES Evnnr RACHIEL- LES, of Cherokee, in the countyof Colbert and State of Alabama, have invented certain new and usefulImprovements in Stone-Drilling Machines; and Ido hereby declare thefollowing to he a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake to and use it, reference being bad to the accompanying drawings,which form part of this specification.

My invention relates to an improvement in stone drilling machines; andthe object of the same is to simplify the arrangement and prove theoperation of a multiple drill, both in the manner of rotating the drillsand applying the strikes thereto; and a further object is to provide animproved means for ad justing the machine to the work in hand.

The invention consists in the novel features of construction, and in thecombination and arrangement of parts which will be fully describedhereinafter and claimed, and illustrated in the accompanying drawings,in

' which- Figure l is a side elevation of my improved machine. Fig. 2 isa vertical longitudinal sectional view of the same. Fig. 3 is a sec- 0tional plan view. Fig. 4 is an end view. Fig. 5 is a vertical crosssectional view. Figs. 6, 7, and 8 are detail views of the knocker, headK and drill respectively. Fig. 9 is a sectional view on line 9-9 of Fig.1.

A is the outer frame of the machine constituting a vertical guideway forthe inner drill carrying frame 11. The respective frames are provided attheir upper ends with cross bars a, b which are connected by verticalscrew 0 40 for adjusting purposes. Journaled longitudinally in frame Bis shaft D having gear (1 on one end which is engaged by propelling gear6 carrying hand crank c. On the shaft D are the beveled gears E whichmesh with 5 the correspondingly formed gears F fixed on short shafts Gwhich have their inner bearings in cross bar H of frame B, and theirouter hearings in arms 71. extending under shaft D as shown.

Bar H is formed with a series of vertical longitudinal recesses I inwhich the drills J atent No. 531,967, dated January 1, 1895.

Serial No. 500,899. (No model.)

are located and through which the short shafts G extend. Each drill isprovided with a head K having the radial serrations k on its under sidewhich are adapted to be engaged by the double wiper L in recess I in barH, and which is secured so as to revolve with shaft G. lVhen the end ofthe knocker first engages the drill head it is near the center thereofbut as the wiper continues to rise itis drawn 6o therefrom and being inengagement with one of the radial serrations the drill is partiallyturned as will be readily understood, as well as being raised from thebottom of the cavity being drilled. I

A series of hammers or strikes M is arranged over the drills, normallyresting thereon, the same being secured to the outer ends of spring armsN which have their opposite ends secured to frame B. Each hammer has aprojection m on its outer side for engagement with lifts O secured inregular succession to endless belts P, which latter at their lower endsencircle and are propelled by sprockets Q on shaft D, while the roller nis 7 5 provided for their upper ends. The lifts are arranged on thesebelts so that the hammers are raised and fall with accuracy andregularity. Reservoir Q, is provided from which lead tubes Q forconveying water to the sev- 8o eral drills.

For adjusting frame 13 automatically within frame A I provide the latterwith the vertical racks B, one at each end. In the slotted ends of thebar H are the short shafts S, which 8 are adapted to move thereinlongitudinally with relation to the said racks by means of arms Tleading inward from the upper ends of said shafts and connected to thelever U on opposite sides of its pivotal point. These shafts carry wormgears V for engaging said racks, and beneath said gears are the beveledgears WV Which engage similar gears in on shaftD. Thus it will be seenthat when worm gears \V are in engagement with said racks 5 they willlower the drilling mechanism automatically as the operation continues,thus keeping the drills constantly at their work. Screw G serves toraise frame B and may also 1 be used for lowering the same when the worm10o gears are not in operation.

My preferred form of drill is shown in Fig.

8 and consists of a stem having the radial blades J which' are V-shapedas shown. A drill thus constructed is peculiarly adapted for stone work.

At each end of frameA are the slotted and longitudinally expanding legsX which diverge from acommon securing point as shown andwhich are heldin the desired adjustment, and from spreading by the cross brace 00.They are also connected to the frame side by the arm Y which holds theframe from oscillating. At the foot of each leg is a slotted weight Zfor counteracting the tendency of the machine to vibrate.

The machine may be conveniently carried from place to place by handles aprojecting from its four corners.

It will be observed that the knockers engage the drill heads just as thehammers are being raised, so that the two movements of the engagingparts do not clash.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. An improved drilling machine comprising a frame, a bar arrangedtherein having a series of longitudinal slots, wipers pivoted within theslots, drills movable vertically through the bar, heads carried by thedrills having radial serrations on their under sides which are adaptedto be engaged by the Wipers,

and means for rotating said shafts, and a strike mechanism for thedrills, substantially as shown and described.

2. The combination of a fixed frame, a drill carrying frame movabletherein, drills and a means for operating them, racks on the fixedframe, shafts carried by the movable frame which are adjustable towardthe racks, Worm gears on the shat-ts for engaging the racks, a means forrotating the shafts, bars extending inward from the respective shafts,and a lever to which the said bars are secured to 0pposite sides of itspivotal point, substantially as shown and described.

3. The combination of shafts D, gears w thereon, oppositely beveledgears W, shafts S having the worm gears thereon, beveled gears on thelower endsot said shafts, each of said beveled gears engaging one of thegears W, and racks R engaged by the worm gears, substantially as shownand described.

4. A drilling machine provided with diverging legs X, cross bar a, bracearm Y, and

weights Z, substantially as shown and described.

In testimony whereof I aifix my signature in presence of two witnesses.t

JAMES EVRET RAOHIELLES. Witnesses:

J. E. DEAN, W. O. HOLESOPPLE.

